Upstream accessibility font size preferences.

chrome/browser/accessibility/font_size_prefs.cc

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/observer_list.h"
+#include "base/prefs/pref_change_registrar.h"
+#include "base/prefs/pref_service.h"
+#include "base/values.h"
+#include "chrome/browser/accessibility/font_size_prefs.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/pref_names.h"
+
+FontSizePrefs::FontSizePrefs(Profile* profile) {
+  pref_service_ = profile->GetPrefs();
+  pref_change_registrar_.reset(new PrefChangeRegistrar);
+  pref_change_registrar_->Init(pref_service_);
+  pref_change_registrar_->Add(
+      prefs::kWebKitFontScaleFactor,
+      base::Bind(&FontSizePrefs::OnFontScaleFactorPrefsChanged,
+                 base::Unretained(this)));
+  pref_change_registrar_->Add(
+      prefs::kWebKitForceEnableZoom,
+      base::Bind(&FontSizePrefs::OnForceEnableZoomPrefsChanged,
+                 base::Unretained(this)));
+}
+
+FontSizePrefs::~FontSizePrefs() {
+}
+
+void FontSizePrefs::Destroy() {
+  delete this;
+}
+
+void FontSizePrefs::SetFontScaleFactor(float font) {
+  pref_service_->SetDouble(prefs::kWebKitFontScaleFactor,
+                           static_cast<double>(font));
+}
+
+float FontSizePrefs::GetFontScaleFactor() {
+  return pref_service_->GetDouble(prefs::kWebKitFontScaleFactor);
+}
+
+void FontSizePrefs::OnFontScaleFactorPrefsChanged() {
+  FOR_EACH_OBSERVER(
+      Observer, observers_, OnChangeFontSize(GetFontScaleFactor()));
+}
+
+void FontSizePrefs::AddObserver(Observer* obs) {
+  observers_.AddObserver(obs);
+}
+
+void FontSizePrefs::RemoveObserver(Observer* obs) {
+  observers_.RemoveObserver(obs);
+}
+
+void FontSizePrefs::SetForceEnableZoom(bool enabled) {
+  pref_service_->SetBoolean(prefs::kWebKitForceEnableZoom, enabled);
+}
+
+bool FontSizePrefs::GetForceEnableZoom() {
+  return pref_service_->GetBoolean(prefs::kWebKitForceEnableZoom);
+}
+
+void FontSizePrefs::OnForceEnableZoomPrefsChanged() {
+  FOR_EACH_OBSERVER(
+      Observer, observers_, OnChangeForceEnableZoom(GetForceEnableZoom()));
+}